added add-rbrtzavala.txt to contributors
added add-rbrtzavala.txt to contributors

joysjsj/patchwork,juliozm20/patchwork,colpac64/patchwork,SarahSexton/patchwork,cadazab/patchwork,rkaranam/patchwork,carufenon/patchwork,Frankyx93/patchwork